This module provides an interface to the Macintosh TCP/IP driver MacTCP. There is an accompanying module,
macdnr, which provides an interface
to the name-server (allowing you to translate hostnames to IP
addresses), a module MACTCPconst
which has symbolic names for constants constants used by MacTCP. Since
the built-in module socket is also
available on the Macintosh it is usually easier to use sockets instead
of the Macintosh-specific MacTCP API.

A complete description of the MacTCP interface can be found in the
Apple MacTCP API documentation.

Create a UDP Stream object. size is the size of the receive
buffer (and, hence, the size of the biggest datagram you can receive
on this port). port is the UDP port number you want to receive
datagrams on, a value of zero will make MacTCP select a free port.